Not necessarily, or even likely, a problem. Look carefully, and you'll probably see that the pulley is turning, but the belt is slipping until it overcomes the inertia of the platter. Does the Aries still use a "talcum powdered" belt? If so, the problem is likely only that you need to re-talc the belt. See the VPI FAQ:
http://www.vpiindustries.com/faq.html#faq11
.
http://www.vpiindustries.com/faq.html#faq11
.