I searched the Tasker google groups forum for the words ""Bad tasker package version" and there were 5 diferent threads addressing this. The number combinations folowing those keywords were all different, but every one involves a mismatch between the Tasker version and the App factory version. For some reason I haven't encountered before, the resulting messages show up in a link that is tied to the search (similar to link above) and doesn't seem to work when I cut/paste, but here are the links anyway:
https://groups.google.com/forum/?fromgroups=#!searchin/tasker/%22Bad$20tasker$20package$20version%22/tasker/240UNuLxi5s/C0xpM0YD3K8J
https://groups.google.com/forum/?fromgroups=#!searchin/tasker/%22Bad$20tasker$20package$20version%22/tasker/AN8ibOaAydw/3UShN7vKh98J
https://groups.google.com/forum/?fromgroups=#!searchin/tasker/%22Bad$20tasker$20package$20version%22/tasker/P6SYY8u6Kgc/JoeLeUwFzpkJ
https://groups.google.com/forum/?fromgroups=#!searchin/tasker/%22Bad$20tasker$20package$20version%22/tasker/TrU8GOWaJ1M/-aGDbrooQDsJ
Here is a google search that may provide a better link to all of the threads:
https://www.google.com/search?q="Ba...s.google.com/forum/?fromgroups=#!forum/tasker
Here are App factory Apk's
Index of /releases
As I said, it seems reasonably certain your problem is that your Tasker and App Factory versions don't match. I don't follow the version numbers and error numbers closely enough to know the ones you need. I'd think if you have most recent version of each you're ok, but there are also two most recent versions of each...one for Android 4.0+ and one for Android 2.3. Maybe you have 4.0 version of Tasker and 2.3 version of App factory? (beats me). I think if you pore through the messages you might find the path to resolve your particular mismatch. Or else contact Pent via email or forum and ask him.