have I been cheated??

[hyungsup]

I ordered a messiah 2 chipped on the satin silver ps2 from www.kanection.co.uk
I works fine but few games such as fifa2004 and 1 or 2 other games doesn;t load up when reseted
I have to go into browser and select the game to load up at normal speed
It's okay with the original......
do u think it;s a messiah 2??
Or is it hard to tell???
I don't really want to open it up you know...