Just reinstall the Symtorrent application using the file provided on the developers website, instead of any other source and it should be sorted out.. I am using that since forever and its working fine.
Presumably you are using version for Symbian S^3 updated here:http://amorg.aut.bme.hu/files/projects/SymTorrent/
Have installed this to E7-00 Anna, 700 Belle FP2 and 808 Belle FP2 and have no such issues with any of them:
As to which Qt versions should be installed upon device this resource may be helpful:http://qt-project.org/wiki/Support-for-Symbian