The first thing I check with Wisperlite is whether it is overfilled.

It might also be that you need to clean the line. The cable inside the fuel line may need cleaning. MSR has a very good trouble shooting manual on their site.

My "go to" stove right now is an EverNew 600 ml pot with Caldera Cone Stove.

http://www.antigravitygear.com/proddetail.php?prod=TDCE06

http://www.antigravitygear.com/proddetail.php?prod=ECA251&cat=99
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"In theory, theory and practice are the same. In practice, they are not."
Yogi Berra