5.9 is IDE version not CodeWarrior version.
you work on win7 platform, thus I suggest using CodeWarrior v5.1.
CW5.1 supports below Operating System:
Microsoft® Windows® XP 32-bit and 64-bit
(Professional Edition)
Microsoft Windows Vista® Business 32-bit
Microsoft Windows Vista Home Premium 32-bit
Microsoft Windows Vista Business 64-bit
Microsoft Windows 7 32-bit and 64-bit (Home
Premium and Professional Edition)
attached is how to download CW5.1
please test the connection with CW5.1.
If still can't connect, If you use mulink universial , please make sure its firmware support 16bit MCU interface.
To update driver, please download tool in this url:
(http://www.pemicro.com/osbdm/index.cfm )
After install the tool. then open it, with MULTILINK_UNIVERSAL connected with PC, you can update the multlink universial firmware as below

Hope this helps,
Jun Zhang