how to use soap in CI?

[eluser]ken.sniper[/eluser]
hi all,how to use model in server? I try to get model.

Code:

$querystr = "select name from sso_member where id=1"
            $query = $this->regcheck_model->execquery($querystr);
            $row = $query->row();
            return "result:".$row->name;

error:
Using $this when not in object context

later,I try:

Code:

$CI =&get;_instance();
            $querystr = "select name from sso_member where id=1"
            $query = $CI->regcheck_model->execquery($querystr);
            $row = $query->row();
            return "result:".$row->name;

and return: result:0;