Recently I replaced passenger side window regulator with super help from this forum and now I feel like giving back to x5 World.
After replacing the window regulator(03 X5)I realized door lock did not operate after installation,I read almost entire forum and did everything suggested.Then I remember having a similar problem with my 95 S500 and fixing it.
This is what you do::::

Locate "Central Locking "fuse(03 X5 is in trunk)
REMOVE the fuse(even not blown)
Wait 10 seconds and put it back.(This, resets the unit)
This may not work for everybody but, IT SAVES TONS OF MONEY for some members.
Biro100