just tryed to import my bitcoin PK to redeem IPO notes...
but without success...
i have win 7 64bit
i used dumpprivkey <bitcoinaddress> who reveals the private key corresponding to <bitcoinaddress>.
then i put the PK here:

but without succes...
i click on "DONE" and i get a blank page.

no tips to fix this issue?
I tried copying and pasting exported Base58 private key in its normal display format:
5Kb8kL f9zgWQ nogidD A76MzP L6TsZZ Y36hWX MssSzN ydYXYB 9KF
This gave me the dreaded blank page of death.

Used this instead (removed spaces):
5Kb8kLf9zgWQnogidDA76MzPL6TsZZY36hWXMssSzNydYXYB9KF
Successful import.

FYI, private key used above is fake (from bitcoinwiki page).