problem with connection with my own wireless network

[#1]

Hi, my Xperia mini sees my network but i cant connect.  i know my WPA shared key number but even if i enter this string in password field, it just does not work.  any clue?  Thanks

[Uliwooly]

I knew it

[sanaz20]

Hi, i have xperia u, and when i want to on my wireless it gives error and cannt do wireless on, what should i do? please help me.