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Hi Prabawa Agung, Please answer this question to get more clarity on this issue. - Is the issue specific to this driver? This issue might occur due to incompatible driver, missing updates etc. 12c509a Datasheet Pdf. You may try to install the driver in Compatibility Mode and check if this helps. You may choose Windows 8 and proceed with the install to check the status. If need be then you may select Windows 7 in the Compatibility list and proceed with the install to check the status.

Press and hold or right-click the driver setup file, tap or click Properties, and then tap or click the Compatibility tab. Select Compatibility Mode as this runs the program using settings from a previous version of Windows.

Make older programs compatible with this version of Windows: Reply with the status of the issue and we will be glad to offer our assistance. Pls, try the modem on another pc, if it works then it means the modem is ok.

Now do this: copy the content of the modem to a pen drive and install the software from the pen drive, after the installation, right click on the software that has been installed, select compatibility mode to a lower version next to the version of windows you are using and click on apply. Now connect the modem to the PC and it will work. If any error occurs different from the old error, send it to me: *** Email address is removed for privacy ***.