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Keil IDE issue with nRF51-DK

I have the nRF51-DK working on two separate computers with Keil v5.13 and the latest SDK. However, on my main computer I am having trouble with Keil and nRF51-DK. When I try to flash/debug the nRF51-DK through Keil, it does not allow me to do so; Keil is not recognizing the JLink device. When I go to "Options for Target"->"Debug"->"Use J-Link /J-TRACE Cortex"->"Settings"->"Debug" I see a large portion grayed out (as seen in image below). Under "JTAG Device Chain" I have the following error: "Cannot read JLink version number". I am only having this problem on this computer; I have tried reinstalling everything and using different JLINK versions. Currently, I am using JLINK v4.96A (latest) on all the computers. The setup was identical to the other computers on which everything is working. Please help me!

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