No sound when auditioning samples in pop up browser ?

Hope you can help with this issue.

I have Cubase 8.5 and all is working great apart from one problem.

If I add an audio track to my project then browse my samples ‘say for a kick drum’ perhaps to import to that track, the pop up audition window shows the samples I click on being played but there is no Audio sound.

I’ve never had this problem before, it’s only occurred since my upgrade.

Anyone got any ideas as to why there is no sound ?

If I audition in media bay etc all is fine .

Thanks in advance and merry xmas everyone.