Greddy profec A wont finish the learning mode

[R3cK]

Hey.
Got the oldschool profec A
Triple checked all the vacuum lines and so on but it will never leave the P1 learning mode.
Any one got a clue about this old fella?

[R3cK]

is it true that the learning mode will take hours sometimes?

[tuiapoo]

it true that the learning mode will take hours sometimes?http://sofire.us/mobi/images/69.gif