cabrio wont star

I have a 1998 VW cabrio. After sitting for around 2 weeks i went to go drive it and got a flashing light on the dashboard that there was a coolant problem. I drove it to my nearest autozone, they checked, filled coolant and i drove it home. Went to try and start it this week and it wont turn over, acts like it wants to start but just wont turn over. any suggestions??