V studio 20 - were can i download guitar track(v studio 20 version) and publisher?

hello, i recently purchased a v studio 20 but i didnt get the software disc with it, just wondering is there any place i can download guitar tracks(VS-20 version) and the publisher? i tryed registering the product but i keep getting this message? any help would be great, ive emailed cakewalk but not getting any replys??

any help would be great 
thanks 

ryankelly13@hotmail.co.uk
The serial number you have provided is invalid, please ensure that you are entering your serial number correctly.If you need additional assistance with product registration please contact our customer service team at 1-888-CAKEWALK orhttp://w

ww.cakewalk.com/Support/contact/csr.aspx