Tried sending from Electrum but got this message:

error: The transaction was rejected by network rules.  (16: mandatory-script-verify-flag-failed (Script failed an OP_EQUALVERIFY operation))

I imported my Armory addresses into a watch only Electrum wallet and my Plain Base 58 Private Keys into an offline Electrum wallet.
I then made a transaction and signed it offline but get the above error immediately after trying to broadcast.

I seemed to be running into this problem with Armory too. I could sign the transaction offline but when I went to broadcast it to the bitcoin network it rejected it and the transaction never showed up blockexplorer.info. I had made a few successful transactions in Armory earlier in the day.

Any suggestions or ideas?

Thanks.