pass list as parameter to webservice

pass list as parameter to webservice

Please help!!
List < SObject > ObjectContents; // {get; set;} contains records of
selected object List str3 = new List (); String FormattedValue;
for (SObject a : for (SObject a : ObjectContents)) // for (SObject a :
ObjectContents)
{
for(String field:fieldApis){ // fieldApis contains list of fieldnames
FormattedValue = '\'' + a.get(field) + '\'' ; //fetches value
of each field
}
str3.add(FormattedValue );
}
//sending data to webservice
sqlArray19.ArrayOfstring a= new sqlArray19.ArrayOfstring();
SQLServerConnector9.BasicHttpBinding_IService1 stub = new
SQLServerConnector9.BasicHttpBinding_IService1();
//sqlArray19 and SQLServerConnector9 classes were formed while importing
wsdl into Salesforce
List<String> insertMsg = stub.InsertQuery(str3); // getting error in this
line
"Compile Error: Method does not exist or incorrect signature:
[SQLServerConnector9.BasicHttpBinding_IService1].InsertQuery(LIST<String>)"
.net webservice given below
public List<String> InsertQuery(List<String> Values)
{
return Values ;
}
**What is the correct way to send List<String> as a parameter to
webservice ?**