no value given for one or more required parameters

A good trick for dealing with a no value given for one or more required parameters error when developing for an Access back end is to grab the content of the CommandText and paste it into a dummy query in Access itself. Then Access will offer you a popup identifying which field is causing the problem (usually a typo, as in your case).

The usual reason for this error is a missing or misspelled value. It seems likely that adminName is Null or a zero-length string.

When pasting the command text into access itself and Access pops up telling you which field is the problem, if there does not appear to be a type, try enclosing the field name in square brackets. [ ] It is possible that one of your columns may contain a keyword. This happened to me, which the column LL_ID - I had to change it to [LL_ID].