No, and that's not the meaning with cursors, cursor means 'current set of records', meaning a snapshot of the requested data. You select the data you request, and then 'disconnect' from the table.
To be able to write the dta back to the table, you have other options. Either you can use an updateable view, or you can write code to compare the data in the cursor, and write the data back to the table programmatically.
>When I do that It doesn't write my changes into the table.