Figured it out. I needed to add single quotes around my key values:
SELECT '" & lngID & "' As NewID, Pattern, Ppod, Date, Qinj_m3d, Cppm, Bags_Week " & _
"FROM [RE_Forecast_Inj] WHERE Key = '" & Me.Key & "';"
However now I can't get my date to insert any idea on that one? The column is set...