cl_flushentitypacket ?!?

ok, when i play counterstrike online, sometimes, well actually alot of the time 2 msg in red writing pop up in the top right corner of my screen:

connection problem (obviously dont need help with what this means )

and

cl_flushentitypacket

now is this something to do with a connection problem? i have no idea?!? oh when it comes up i hear a water sound effect? ive asked around in cs and no one seems to know.... can anyone clear up this problem?

btw my modem is a 56k