my wifi connection

[#1]

hi i have a blackberry 8520 it was ok till last night everyti,me i try to connect to wifi on my phone its just saying connection failed due to incorrect network credentials please verify this profiles security settings, i dont know how to sdo that can you help?  xx

[#2]

Hi porcha27,
Welcome to our community forums.
Are you entering the wireless key that is printed underneath the router for the password(it's case sensitive)?