Wildcard ssl certificate error

Hi,

I am trying to import wildcard certificates example *.mydomain.com and *.domain.com i was able to install the certificate , but when i try to import the private key it gives me the following error : 01070712:3: Unable to verify key (/Common/Mydomainwildcard.key) is protected by provided passphrase.

even though i entered the correct password gave me the above error .

i followed the following link to install the certificates : https://support.f5.com/kb/en-us/solutions/public/14000/600/sol14620.html3

appreciate help :)