I have connected my phone to the PC with Toshiba Bluetooth and Nokia PC suite cannot see the phone.

Check that you have only one phone connected to the PC. Right-click the PC Sync icon on the Windows taskbar (next to the clock) and select Phone Selector from the pop-up menu.

If you cannot see any phones in the list or if your connected phone is displayed in grey text, update your Toshiba Bluetooth stack. The latest Toshiba Bluetooth stack can be downloaded from the Toshiba website.