Help 3G conect problem

[Zhalas]

i got a problem with conecting to 3G, i have a a GT-I5800 and yesterday i flashed from eclair to froyo with a tutorial here in the forum and i have this problem i dont know what happened if anyone can help me i will be very thankful so please help me =D
PD: i'm from southamerica and the froyo version is from Europe

 

[El Presidente]

You probably need to set your APN settings. What network are you on?