Vector of Vectors: Accessing a value

[javaQQ]

I would like to use a value stored in a vector of vectors as a Prepared Statement parameter.
This attempt:

for ( int i = 1; i < ( 10 ); i++ ) {			
...
	pstmt.setString( 4, (String)((Vector)orderDataVector.elementAt(i)).elementAt(2) );	
...

}

Returns this error:
...: Method elementAt(int) not found in class java.lang.Object.
insertSpecs.setString( 4, (String)((Vector)orderDataVector.elementAt(i)).elementAt(2) ); // supplied_materials;
^
How do I fix this?

Many thanks in advance.