Infinite running of patition query

I have a table with 50 million records.I tried to partition this table,but partitioning query is running infinitely.Any help will be highly appreciated. I am using sql server 2008 r2 and have used the below query CREATE PARTITION FUNCTION part_func (numeric(18,0)) AS RANGE left FOR VALUES (1253072,1353072) go CREATE PARTITION SCHEME part_scheme AS PARTITION part_func all TO ([primary]) go --Dropping and creating clustered index based on partition key ALTER TABLE [dbo].[SALES] DROP CONSTRAINT PK_SALES go CREATE CLUSTERED INDEX [PK_SALES] ON [dbo].[SALES] ( SALES_ID )WITH (SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF) ON [part_scheme]([SALES_ID])