Unable to add maven2 project

Hi.

When I insert data at "add project" of maven2, It was displayed as below on continuum-1.3.3.
"The specified resource cannot be accessed. Please try again later or contact your administrator."

I did inserted data at maven2.
scm:svn:https://hostname/svn/project/trunk/pom.xml

And I did inserted data "scm"
https://hostname/svn/project/trunk/pom.xml
but It shown display erroed "Missing ''scm'' element in the POM, project "

So I shown open sources of continuum. (AddMavenProjectAction.java)
catch ( MalformedURLException e ) <-- alert execption.

{ addActionError( getText( "add.project.unknown.error" ) ); return doDefault(); }

Could you please how to solve it to me?

Best regards Thank you.