worng provider

Hi
i have problem when change channel
when connect line receive dcw without problem when change channel and back again previous channel cant receive dcw
i check log and see this :
when open channel without problem...
[00:18:02.099] <- ecm from CCcam client 'xxxx' ch 0500:032920:019a (>300ms)
[00:18:02.297] => cw to CCcam client 'xxxx' ch 0500:032920:019a (302ms)

when back to this channel after change channel:
[00:18:02.510] <|> decode failed to CCcam client 'xxxx' ch 0500:032920:019a, Wrong...

worng provider