passing xml to stored procedure

[delfy]

i can execute my stored procedure which takes a string containing xml as input fine from query analyser and it works properly. However when i try to pass it from delphi i get this
error xml parsing error: invalid at the top level of document

so i generated my xml string into a memo cut and paste this in query analyser and it works fine? what can i do about this situation. why would i get an error passing this to xml string from delphi to sql server?