themes problemi

ko hočem spremenit themo v win98 mi napiše:

THEMES caused an invalid page fault in
module < unknown > at 0000:00000789.
Registers:
EAX=00000000 CS=015f EIP=00000789 EFLGS=00010202
EBX=00000190 SS=0167 ESP=0064f0c3 EBP=00000782
ECX=817224dc DS=0167 ESI=bff772fc FS=2b97
EDX=bffc9490 ES=0167 EDI=bff5581c GS=0000
Bytes at CS:EIP:
31 20 20 20 20 a0 00 70 00 c0 a0 7a 02 98 02 4c
Stack dump:
0064f0c7 00000000 000190bf 40979200 410af000 64f9f400 64f9dc00 00031c00 64fa2600 00000000 64fa0800 64f9f000 00031c00 64fa3a00 00002c00 f245b700

zakaj?