i can't install a .ztr file ( windows xp theme ) in my sony erricsson p910i.i used a program named 'tracker' to install the .ztr file but it didn't work out.can anybody help?

Is´t a tracker skin you wanna install? if so; check the FAQ

btw, welcome to m9

thanks! yes, it's a tracker skin. when i sellect this skin,
this message appears:

Programm closed
programm Tracker
reason code KERN-EXEC
reason number 3

thanks anyway.