I need a bit of help with PSX-Change

[Ougami]

I recently purchased Tokimeki Memorial 2. I use the PSX-Change disc to play imports. When I try to enter the anti-mod code, however, it freezes once I finish putting it in. I don't really know of any reasons, I've not had problems with other codes. If it would help, the code is:

D00108C6 1040
800108C6 1000
D001153C 0001

I've ran out of ideas, but nothing I've tried has worked. Does anyone have any ideas on how to get it to work? I would really appreciate any help. Thanks.