Ustream Producer 5.0.3 Stops Recording

After using Producer to video-cast our two hour morning show on KCR921 for the last two months all went well. Then starting 3/18 Producer stops recording at random times. On the next 4 programs this two hour show would stop at various times and have to be restarted. On 3/23 I did a test recording and let our program run and on two occasions it ran for 28 minutes then quit and another for 40 minutes. We haven't anything else running on this computer but Producer. We have 5meg upload capacity on TWC cable. The fact that Producer ran for 45 programs(days) without a problem tells me that something is up. Any ideas.