[plt-scheme] TCP error 10038

Hello

running under Windows XP 
program with require from PLaneT
have an error (but not always):

.\..\..\..\..\Documents and Settings\DTNOIZR\Application Data\PLT Scheme\planet\300\4.1.5\cache\schematics\spgsql.plt\2\3\private\p3-msg-util.ss:221:30: tcp-read: error reading (Unknown error; errno=10038)

tried from different computers from different places - always this error
just typed:

#lang scheme 
(require (planet schematics/spgsql:2:3/spgsql))

and got TCP error ...

its begun after I have installed a fresh PLT Scheme version 4.1.5, yesterday

sorry for my bad english ...