just installed a mics 7.0 and added a flash 2.2. everything working except if you use the voicemail transfer button f986 it ask for mailbox and then after dialing mailbox is displays not allow. can transfer to ext and it goes into voicemail but not thru vmtr. have ck feature codes. voicemail was defaulted and started again.............never ran into this. nothing in guide on this for trouble shooting