Import- some fields will not show up in mapping

[skingjack2]

Hi,

Just trying to import files from a prev version db to an updated version. I'm experiencing difficulties in getting 4 fields to be shown when mapping the fields upon import into the newer table. I've checked both exported versions (FM/Excel) and the fields & the associated data is present. The fields in question are not anything unusual in type ( i.e. phone #s); any thoughts on what might be causing this issue and a possible resolution?

TIA.

Jack