can't Recode RNS-E after US firmware upgrade.

Has anyone tried recode their Nav for a Phone option after the US firmware upgrade. I have EU "P" unit that i was able to recode for the "phone" to show up on the DIS but since i reflashed it to US firmware i can't recode it for example i have a 2000 A6 it was coded 0509115 and now can't change first 1 digit to anything other than 6 or 7 which is telemaics. Has anyone seen this problem? [/b]