thanks Frank, here is the log
==============================================================================
Starting OCS Inventory NG Agent on Tuesday, April 28, 2015 17:18:17.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:00.
==============================================================================
Starting OCS Inventory NG Agent on Tuesday, April 28, 2015 17:18:29.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:01.
==============================================================================
Starting OCS Inventory NG Agent on Tuesday, April 28, 2015 17:18:36.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:01.
==============================================================================
Starting OCS Inventory NG Agent on Wednesday, April 29, 2015 06:30:08.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:31.
==============================================================================
Starting OCS Inventory NG Agent on Wednesday, April 29, 2015 06:41:36.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:04.
==============================================================================
Starting OCS Inventory NG Agent on Wednesday, April 29, 2015 07:12:59.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:01.
==============================================================================
Starting OCS Inventory NG Agent on Wednesday, April 29, 2015 07:25:46.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:01.
==============================================================================
Starting OCS Inventory NG Agent on Wednesday, April 29, 2015 08:07:25.
AGENT => Running OCS Inventory NG Agent Version 2.0.5.0
AGENT => Using OCS Inventory NG FrameWork Version 2.0.5.0
AGENT => Loading plug-in(s)
AGENT => Using network connection with Communication Server
AGENT => Using Communication Provider <OCS Inventory NG cURL Communication Provider> Version <2.0.5.0>
AGENT => Sending Prolog
ERROR *** AGENT => Failed to send Prolog <HTTP Status Code #500>
AGENT => Unloading communication provider
AGENT => Unloading plug-in(s)
AGENT => Execution duration: 00:00:01.