Not sure, reading the above comments, whether you still need help with hg qimport, but in case you do:

- Make sure you have the following lines in your ~/.hgrc:

[extensions]
hgext.mq =

- If you still get errors, check the syntax of hg qimport using

hg help qimport

- If none of the above helps, reply with the exact command line and the complete output from hg.