Hi,
MaxZ determines the maximum amount that the prove is allowed to travel in Z before it decides that there is nothing to find.
I'd bet that a MaxZ limit is set = 0 (which would be the likely default value if is has never been set before).
Check the MaxZ settings in these places (different DROs control this for different probing actions):
1) WC Offset Probing tab page; Probing Op Parameters Panel; "Max Z Distance" DRO (controls max z for probing page operations)
2) Settings common tab page; Upper panel, right side, "Max Dist" in Touch area - this controls MaxZ for probing to a mobile touch plate.
3) Settings common tab page; Upper panel, right side, "Max Dist" in TC Pos area - this controls MaxZ for probing to the TCP TP.
BTW, MSM support is mainly at this board:
calypsoVentures.proboards.com
Dave