A1200 accelerators should have no problem accessing PCMCIA - if in doubt, try without accelerator and get it working first. Then try with accelerator and go through the ACAtune settings, but also try switching *off* iCache in order to slow the machine down (note that some PCMCIA adapters and/or CF cards are really slow!).
For ACA630, there might be the chance that you need a firmware upgrade. You can test this by removing all jumpers: If PCMCIA works without jumpers, but does not work with BootSel or NoDisk jumper set, then you need a firmware upgrade. This is handled under warranty and has been done for a number of customers already - please contact your reseller about this if you have trouble like that.
Note that all new ACA630 have this PCMCIA fix already.