Hi. I'm on Sonar X2. I use a laptop with Windows 8 64 bit. And the machine has a 1TB disk and 6GB ram. The processor is a i3. 

I have received an external drive with severall recordings. They were done with w64 files (Cubase). I'm asked to mix them. When I try to load these files I receive a directshow 0x80040265 error. Wich tells me they would be corrupt. But since they play back on a cubase machine I don't think so.. 

I have since then installed two directshow packs. But there is no difference. Anyone solved this? I'd love to hear it.
I can use FOOBAR and convert the files. But since the manual says Sonar is compatible with W64 I'm sort of take by surprise.

I can load the files in Nuendo. And in Foobar. On my studio machine. But they won't load in Sonar X2.

w64 files should be np.  are you running 32bit or 64bit sonar??  
i used to get those kinds of errors when i didn't run sonar as administrator.