Webservicequery

Hi

we have a textfield where we perform validation  by calling a webservice query. 

validations are working fine when i test it from interface in designer mode.

When i test from site, it throws below error.

An error occurred while executing a save: Expression evaluation error in rule at function 'webservicequery' [line 13]: Could not parse WSDL

inside saveinto of the textfield

a!save(local!result, webservicecall),

validation:if(local!result,"","Please enter valid date")

CAn we call webservice query in saveinto?

Please advice