I used google to find the thread on this site. Simply typing rockband 3 or keyboard in the search criteria didn't work.
I used IOS223 rev 7 and kept clicking the sync buttons both on the usb dongle and the keyboard and after about 15 clicks it synced!!!
If possible, Admins, please move this to the rock band 3 section because I'm pretty sure someone else will come across this issue.
I hope that this can help someone.
Thanks again wiihacks you guys rock!