Every time i try to visit a certain website (http://www.airsoftsverige.com/) using firefox I always get this error-message:
Microsoft VBScript runtime error '800a0005'

Invalid procedure call or argument: 'Mid'

/root/siteConf.asp, line 57

Now I have done some searching but have not found any solutions. I think (not 100% sure here) that this all started after I installed SP2. My os is windows xp sp 2, firefox version 1.0.7.

It works on other computers, and so far this is the only computer I have had problems with this on.