computer won't come back from standby

[bobjones]

It seems about half the time I put my computer into standby, it won't come back prompting a manual reboot.

I've made sure that I've gone under the driver settings for both my mouse and keyboard and enabled them to bring the computer out of standby.
It's always done this too, getting a bit annoying.

Using windows xp, hardware in sig. (cooler master case btw)

Thanks for any ideas.