Chain certificate in F5 load balancer

We procured wildcard certificate from Thawate and Thawate suggested we download the two intermediate certificates for the wildcard cert to work. When I try to apply the wildcard cert in the SSL client profile created for my application and try to sync the two boxes, I see sync fail and an error that the private key is not valid. I tried creating a chain certificate using the SOL13302, but when I try to verify the chain certificate, I receive error.