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J.F. wrote: Remember that 3.71 had different NIDs for the ME stuff, and no NID resolver. If you look at my MediaEngine PRX, you'll see have have special support for detecting 3.71 and using the 3.71 NIDs.

Thanks for your reply! So that's why DisplayTest-v1 can run correct on psp2000(3.71m33).
:)

Why MediaEnginePRX-v1.0a can not run correct on my psp2000(3.71m33-4)?The result is: mediaengine.prx loaded/started Initialized MediaEngine Instance Now testing MediaEngine functions Testing BeginME...passed! 1 0 0 1 0 0 : : 1 0 0 1 0 0 Result is 00000000 Testing CallME...failed! Error calling CallM...