hi !
to activate the 2010.3 version (before), were you using the old license server we (procedural) provided or did you use an other Esri-based FlexNet solution ?
the license server technology we're currently providing for the CE 2011 is still the same and did not change since 2010.3, thus it 'should' work. But I could put the package we handed over to Esri with the first 2011.1 version to an ftp of yours, if wanted (PM me with ftp access) for additional testing.
for test's sake, I can send you a time limited concurrent license file so we can exclude case that you have a non-working lic file.
please let me know.
matt