I'm also experiencing the same problems with VectorWorks 2008 and a "C" serial number.
Initially I thought it might have been due to older versions of the HASP license manager running on other servers for other products. So I created a nethasp.ini file to point VectorWorks to the correct server. This failed to work.
As a test I moved the license manager (I'm using the latest version from www.aladdin.com) and dongle onto a clean box and then installed VectorWorks 2008 (automatically updated to SP2 during the install) on the same box and I'm still experienced the same error.
