Sorry folks but this is the only place I can ask this after getting no ideas on the Pocomail Forum

Setup: Win2kpro: Pocomail 3.0.3.1740 + Avasti + K9 + Sygate Personal Firewall.
All works fine - if slow - but nothing unusual there(pocomail is the slow one I believe). I don't get a lot of very large attachments so I may not have noticed this before....
Three time this week a client has had cause to send me large attached files. 2-5 megabytes. I have had great difficulty retreiving them.... because of long time outs once they were downloaded. I am on DSL, no network.
Today I monitored what was going on with Ostat graphical bandwith monitor and FILEMONITOR and FreeRAM.
The mail was checked and collected... it got to the email in question and I watched Ostat as the attachment (5Mb) all downloaded fine. Then nothing.
I started FILEMONITOR and FreeRAM to monitor activity. The processor went to 100% and Pocomail and Sygate and Avasti were continuously operating.
The total time for all of this processing to finish before Pococomail reported on it's email collection was approx 220% the original total download time of the attachment in question... judging by the time/grap of Ostat. And this ties in with previous experience this week.
The problem is Pocomail seems always to timeout with the server during this time and doesn't make all those emails as collected.... so the next time I check the mail I get them all again including the attachment - so I have to go to the server and manually erase them.
Is this a known issue ? Any advice ? suggestions ?