Rekordbox 3 will not play loaded tracks

0) Have you read the "READ ME FIRST" thread in its entirety before posting: Yes, I swear it!

1) Operating System: Windows 7

2) OS Type: 64bit

3) Rekordbox version: 3.0.0

4) Using LINK: No

4a) LINK Connection method: n/a

4b) Using with CDJs: Yes 2000 Nexus via usb key

5) Hard drive / Flash drive / SD card file system: Not sure

5a) Does the device have multiple partitions: n/a

5b) If it's a flash drive, is it a U3 device: n/a

5c) With what utility did you format the device: n/a

6) Have you scanned your files for errors: Yes

7) Have you scanned your drive for errors: No

8) Is Rekordbox crashing at all: No

8a) If crashing, is it resulting in: n/a

8b) If not crashing, are there any error messages: n/a

9) Are you able to repeat / reproduce the problem: Yes

9a) If yes, can you do it consistently: Yes

10) Any other notes regarding your setup only: n/a

Provide as much detail of the issue here: I just upgraded to Rekordbox 3 and since installing I cannot play any tracks.

When I double click them they load into the play area at the top of the application and the multicoloured wave form displays but when I click the play pause button/icon on the right the track does not begin to play. The button does turn grey and the "Tap" button becomes active.

If I hover over the artwork column a play icon appears and when clicked a the preview does play.

I can click and drag along the blue wave form at the very top of the screen and this moves the my position in the multicoloured wave form but if I try to do the same on the multi coloured wave form nothing happens, I cannot get it to move or play.

Please help me!