need advice on mini cooper 2007 cas3 lost keys with avdi please

[raptureready]

hi there
I went out to a mini cooper 2007, lost keys, picked door ,decoded with lishi, cut key with 3dpro all good, plug avdi in and it processes cas 3 and then no working key found, and if you want to continue it asks for dump, the cas3 sw no is 6112233, this one takes the round fob that slots into dash, I haven't got the very latest bmw update as must still get ams in jan as they closed now I hear , I was told by someone to try the online version, but was not sure about internet connection losing connection, is this a option or must I remove cas to read and get a dump for avdi, or can I just use tango for whole job, not sure what to do next, also how do you know if its cas3 or cas3+ does avdi display the difference? also any advice on removing dash as I hear its a big job and I haven't done one yet, a few steps to guide me through by a pro would help any advice would be great
kind regards

[obdsystems]

Its gotta be CAS3+ if asking for dump. like to help more but not done CAS3+ lost keys.
Need R270 / red rosfar clone

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