Problem With Cradle And Tv Out

[coevin]

Hey all i received my cradle today and i have 2 problems.

1) i cant seem to change the screen postion from the main menu it just wont let me move it.
2) Now this one is bugging the hell out of me im playing picodrive and sonic now this runs smoothly when not through tv out. However when i put it through the tv it stutters every so often and its really annoying. Is there something stupid im doing wrong?
Cheers for any help

 

[coevin]

ok another question.

if the cradle is powered by the gp using an adapter will this effect emulation performance? Im only getting 37fps on sonic3. If i get a plug for my cradle will it improve?