zabhi,
I set up 4 virtual machines - Win XP SP3 x86, Win XP x64, Win 7 x86 and Win 7 x64. I installed vcredist_x86 only, then downloaded PPModd and Qt libraries. 6303c rm443__10.10.ppm_mb was parsed without any problems.
Maybe ppm you want to open is broken by other tools or by revious verson of PPModd. Please be sure you're using original ppm file
I guess you haven't installed any debugger?