wont start anymore, please help, (1 Viewer)

[stefan2009]

Problem Event Name: CLR20r3
Problem Signature 01: mediaportal.exe
Problem Signature 02: 1.0.2.42485
Problem Signature 03: 4a04b3db
Problem Signature 04: System.Configuration
Problem Signature 05: 2.0.0.0
Problem Signature 06: 4889de74
Problem Signature 07: 1a6
Problem Signature 08: 136
Problem Signature 09: IOIBMURHYNRXKW0ZXKYRVFN0BOYYUFOW
OS Version: 6.0.6000.2.0.0.256.1
Locale ID: 1043

these are the crashing logs that are displayed when i try to start mediaportal, worked fine before,

already tried to change xml filename but didnt work,

please help,