Hi Barry,
It sounds like there may be access issues at play, but it sounds to me that it's more related to the application environment than SQL Anywhere specifically. Is this just a regular .NET program? Can you provide more details about what you're doing in your code and what data you're seeing that is 'not incrementing a field'?
If you ever need immediate assistance, the best resolution is to open an incident with support: http://support.sap.com/
Regards,