Access to the Solver was changed between version 1.0 and 1.1 of the TimeSeries+Drawdown workbook.  Version 1.1 is more stable and has less security conflicts than version 1.0.  Version 1.1 does not require access to the VBA project (pg. 15, SIR2006-5024).  The SOLVER WARNING form is no longer needed and has been removed (pg. 30, SIR2006-5024).   

V1.2   allows solver to be found in 2007 and has a few overrides for plotting flows in 2007.  Quick fixes, not good solutions.