restoring my ifone...help guys!

[m750]

heeey guys. i recently installed the finder app, and the terminal vt-100 ap and i noticed that when i went to youtube i could view the featured list but whenever i go to the search tab and search a video it says " cannot connect to youtube". after this my wifi connection started to disconnect itself and switch to EDGE. so i would go into my setting wifi and try to connect to my lynksis router and it wouldnt let me, but after i try a few more times it will connect me back to wifi. is this because i installed those damn applications or just from using wifi all day long?

[dictionary]

Problem isn't from those apps, as I have them both installed on mine, and mine works absolutely fine. How did you jailbreak it?