Wav Out works, but ASIO4ALL does not ???

As I'm working my way thru Reaper, learning as I go. I came across the asio setting which I can't seem to figure out. The Wav Out works fine, but selecting asio4all doesn't produce any sound. In both audio and midi. I do however use asio4all in other programs on this computer with no problem. I did search the forums for an answer but even though I found quit a bit on asio, nothing really addressed this problem... Hopefully since I'm new to Reaper its just a setting that I missed... Any ideas ??? Thanks, SG Dell XPS laptop Vista home SigmaTel High Definition Audio asio4all Intel Pentium III Core(TM)2 Duo CPU T9300 @ 2.50GHz SigmaTel High Definition Audio CODEC My current settings...

Try checking the 'Force WDM driver to 16 bit' box.

one driver to rule them all 

Make sure you are not running another app that uses the drivers or device. I found that I couldn't use ASIO4all when I had Firefox running with video in it. I could be wrong, but I quit Firefox and Reaper has sound. just a thouht.

Double check and make sure you are running your soundcard's latest drivers also. I had trouble with ASIO4ALL too and that fixed the problem.

You can also try to uncheck "Allow projects to override device sample rate". -Data

Thanks for the replies guys. I went through all your suggestions but still have no sound when using asio. I'll add, as I hunted around I noticed the VU's ARE active when I hit play. And I also noticed in the I/O (routing) of the track and mixer that under "audio hardware outputs" everything listed there says "not connected 1 / not connected 2" However when I switch from ASIO to Wav Out, then under that same "audio hardware outputs" I found Hardware Left Output/ Right Output. And I can then hear the tracks play. How then do you 'connect' the outputs while in ASIO ??? Thanks again, SG

i use asio4all and have no problems. only time is dont get audio is when i like drillbit said it i already have a video app running before hand like youtube or music or something like that. i just close it out and everything works fine.