You reported the following error report:
AppendStart2 [2] *
BGen2 [31]
<[fmVT.mModules.mBnlx.mSaved2; Click]
<[fmVT; Wait]
Start [44]
This indeed could have been caused if you did not have write privileges. However, this code you reported in the error report is old, and not in a any recent version of Tooltip Tool NT.
EDIT - Ah - I see! You are using the old Tooltip Tool, not tooltip Tool NT. The newest version of the later was released in August of 2012.