Sandra, here is a link I found with a report by a guy whose Phals were showing similar symptoms as you described:
http://www.geocities.com/tlswilso/Ph...s_2-15-04.html
I'm not sure if there is any answer in his article but it may help. Hving read to the end of the story I now know he is asking for a name for the prob. and also for a cure. Sorry!
Bill