Hi all:)
I have a lexicon Lambda as an audio & midi driver on my system. works w/ biab & sonar x-1 on same system..i try to use ptw and input some midi data ansd no dice....error message says lambda midi not installed on your system...using win7....thanks in advance........

Question - what version of PTW?

Suggestion - if it works in Biab, try Realband (instead of PTW) .. it'll likely be the same version and might have better success without a bunch of tinkering.

Otherwise visit the Options - Preferences section and check the Midi and Audio drivers being used in PTW.