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immobilser/dme problem?

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hello. i have a boxster 2.5 tiptronic 1997 here that is non start. i have no history other than bought in auction and it looks like everyone and their mother been into it. anyway the problem is that it doesnt crank.have had pst2 on it and no codes there. have checked alarm and key transponder and when insert key and turn the immobiliser deactivates. reflashed the dme. when trying to input codes from IPAS numbers it kicks me out after entering immobiliser code??

the start relay in trunk has its feeds but the switched earth from dme is not present.

everything seems to be there and paired but as if still not talking between dme and immobiliser box(which is dated 2011 so obviously replaced). i bought and programmed new key and that all seems to work.

another weird thing is that if i do sports car handover it says alarm not found??? if i go into alarm system itself with pst2 it all seems to be there. including brake light switch,tip lever position,pill in key etc etc.

any ideas?

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I assume you turned the PST2 off (and the car off) between programming the key and trying to re-flash the DME?

If not try that as I have seen similar communications problems when going from one module to another after coding one.

Oh.. and check the connector on the DME - remove it and see that the pins are not bent or corroded. Then tighten it back down.

And a silly question - a PST2 with the real cable or a clone. There were a bunch of clones sold out there with mis-wired cables that will not program any car - ever.

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yes i programmed the key first and it was few days later that when still not cranking i decided to flash the DME.

it is porsche genuine PST2 and cable. have used it past 5 years for programing and all diagnostics,no problems.

there was a strange thing happened when i went to enter the immobiliser code as thought why not try and reprogram like new unit as last resort. after entering old then new code(same as old as not changing it) the PST2 said test aborted and a code (which cant remember)

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