SOLVED New purchase DJ TECH I-MIX, MIXVIBES 3DEX LE

Hi
Just purchased DJ TECH I-MIX, MIXVIBES 3DEX LE and have installed software OK but cannot operate i-mix controller, green light, lights up on i-mix when buttons pressed but does not do anything.
Windows vista PC
can anyone help?
Just purchased DJ TECH I-MIX, MIXVIBES 3DEX LE and have installed software OK but cannot operate i-mix controller, green light, lights up on i-mix when buttons pressed but does not do anything.
Windows vista PC
can anyone help?