If your connection to the Mersenne server is so intermittent, why not switch to work units that take longer to complete?

I switched to LL-DCs, which each take 1-2 weeks to accomplish. No further problems, and my CPU credits accumulate more quickly. Besides, I just might find a prime at the 20-meg level more quickly doing double-checks than doing initial LL's at 30-to-45 megs.