Inserting in database table...

        I am facing problems inserting record(s) in a database table.

         I keep getting the error:

	ORA 00664: sql error, at recursive level1
	ORA 01722: INVALID NUMBER	

	All the entries in the record match their defintion(s)...., so I don't
	think it is due to a bad entry type.

	I get the same error both on Forms4.0(INVALID NUMBER EXCEPTION) and the 	SQL*Plus shell.

	any help in this regard appreciated...

	thanks,	
	raj

	PS: The table is part of an heirarchical structure, inheriting foreign
	    keys from two other tables.