I generated a CSR and Private key in Plesk, which I used in the ordering procedure (the CSR of course). Upon receiving the definite SSL certificate from Thawte, I discovered to my horror that I can't upload it for the generated combo CSR-Private Key: all the fields and buttons for this certificate are DISABLED in the control panel...! Also, no information is displayed in the Preferences pane of the window (where normally the interpreted CSR info is displayed). The CSR itself checks out correctly at the Thawte tool provided (on http://www.thawte.com/support/keygen/index.html in the right margin, titled "Test your CSR"). Anybody seen this before? How can I proceed from here?