[Solved] LS 500 error

[semprot]

Hello,

I used 4.1.11 before but there was an error, so recently my hosting staff did this :
-Switch to Apache and then recompile PHP/Apache while it's running.
-Reinstall LiteSpeed with newest version (4.1.12) and then build a matching PHP binary.
-Switch back over to LiteSpeed.

But i get 500 errors all over now. Is it because i should use 4.1.11 instead of 4.1.12? 4.1.12 is buggy?
Or did some step was missing?

I got this from whm > ls > server log viewer

2012-04-26 11:43:23.615	INFO	[114.79.1.170:43856-0#XXXXXXXXXX.com] Connection idle time: 121 while in state: 5 watching for event: 25,close!
2012-04-26 11:43:23.615	NOTICE	[114.79.1.170:43856-0#XXXXXXXXXX.com] Content len: 0, Request line: 'GET /XXXXXXXXXXXXXXXXXXXXXX HTTP/1.1'
2012-04-26 11:43:23.615	INFO	[114.79.1.170:43856-0#XXXXXXXXXX.com] HttpExtConnector state: 8, request body sent: 0, response body size: 0, response body sent:0, left in buffer: 0, attempts: 3.
2012-04-26 11:43:23.615	INFO	[114.79.1.170:43856-0#XXXXXXXXXX.com] Lsapi connection state: 2, watching event: 25, respState: 1, m_iTotalPending:0, m_iPacketLeft:0, m_iCurRespHeader:0, req sent for 4 seconds,Total processing time: 4.
2012-04-26 11:43:23.615	INFO	[114.79.1.170:43856-0#XXXXXXXXXX.com] File not found [/home/XXXXXXXXXXXXXXXXXXXXXXX/public_html/500.shtml]

Thanks.

Edit : i just realized i posted on wrong sub forum.. Sorry i was panic.