Hi i bought d-link 2640u and i am using as land but i don't know how to use it wireless with my laptop del vostro1510 . if u could help me up i be so thankfull. my e-mail is [email protected]

You said that your are using it as a wired connection and I believe the wired connection is working properly.
The you will need to open the router set up page and create a new wireless network or check the wireless settings of the router.
Once you get the wireless settings of the router , you will need to connect to the wireless network on the wireless computer. it depends on the operating system on your computer.