thanks rick for your help. my problem is solved by : 1. the bluetooth driver for my laptop is correct which i have i.e (www.dell.com/.../DriverFileFormats). 2. i solved it by this : control panel>administration tools>services>bluetooth support > change it from disabled to automatic  & then restart the laptop , it will start working properly.
hi, i dell vostro 1540 with windows 7 32 bit,  i having trouble installing bluetooth driver listed on the website of dell for my laptop & i have come to know that wireless card in my laptop is 1702 & driver configured for 1701 will not work . The driver listed their is for 1701. i had installed a combo driver i.e WLAN & bluetooth (you can see  this driver [URL] while the driver got installed successfully for wlan as well as bluetooth and wlan is working properly but bluetooth is  having following problem: 1. bluetooth icon in windows mobility centre that bluetooth is working & as try to connect to other device with laptop it does not connect, neither my phone nor the laptop connects through bluetooth. 2. when my bluetooth is open, the external devices like hard disks or pendrive which i connects with my laptop while the work properly but at time ejecting it doesnt  show the option of ejecting. 3. as try to open device & printer option from start menu or control panel , it does nt open but as soon as i switch of bluetooth it gets corrected . i have tried to install all the driver in the correct order which i found out from dell website. please help me find the right driver for my laptop. 
bluetooth driver