Suffering with Dropouts when using ASIO4ALL

Hey everyone/Anyone. Bueller? Bueller?
Has anyone had the same problem as me when using Asio4all causing dropouts?
If I run the software with the Primary Sound Card as the output - No problems. Switch is to Asio and I get dropouts every 20 seconds or so.
I've got a USB soundcard as a secondary card for headphones, but it really does appear to be Asio that is the problem.
Any ideas? I'm starting to lose my will to live with it!
Cheers in advance
Mozza
Has anyone had the same problem as me when using Asio4all causing dropouts?
If I run the software with the Primary Sound Card as the output - No problems. Switch is to Asio and I get dropouts every 20 seconds or so.
I've got a USB soundcard as a secondary card for headphones, but it really does appear to be Asio that is the problem.
Any ideas? I'm starting to lose my will to live with it!
Cheers in advance
Mozza