Looks like limiting the transaction log size to 30mb is not the answer:

Message = "The transaction log for database 'Customers' is full. To find out why space in the log cannot be reused, see the log_reuse_wait_desc column in sys.databases"

UPDATE: I asked the hosting company to remove the size limit on the transaction log. I'm hoping that because the recovery model is Simple, the log won't grow too much even if it's infrequently backed up by the hosting company.

Thanks,

Matt