Internal Player don't start

[mazzaaldo]

MediaPortal Version: 1.0 RC2 same problem with old version
MediaPortal Skin: none
Windows Version:
CPU Type: opteron 180
HDD:
Memory: ddr
Motherboard: lanpary
Video Card: ati 4850
Video Card Driver: catalyst 9
Sound Card: realteck
Sound Card AC3:
Sound Card Driver: 4.01
1. TV Card:
1. TV Card Type:
1. TV Card Driver:
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case:
Cooling:
Power Supply:
Remote:
TV:
TV - HTPC Connection:
I've reinsall server time all version of mediaportal but I've always same problem: internal player don't start, if I use external player all work correctly. I've k-lite code pack intalled.
Can you help me?

Problem was ati Catalist control center and k-lite (maybe, I'm not sure), i've installed CCC and another ffdshow pack and now all work fine! ;-)