[Q] 3g connection problem - won't connect, setting corect (stock ICS)

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http://forum.xda-developers.com – Phone updated to ICS through sony's software. connects with wifi no problem. in settings 3g connection enabled, internet setting (mobile networks>access points) checked with operator's info and seem OK, and i used the context menu>reset to defaults option, restarted phone but with no help. Can't delete them though from there to add new manually (is that possible ?) operator (play poland) allows only MMS settings to download to phone by sms and the above internet settings phone configured automatically (HowTos)