# Connectivity Issues

Sometimes, you may have issues with your server. You can see these issues on **Last Connectivity** column. This column display the error while the Message column will display any recent problems or issues related to server connectivity.

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To see more information about this issue, you should make **Message** column **visible**. Click to **Show/Hide** Columns button on the right top area.

Click to **Message** button to enable it.&#x20;

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You will see more information about connectivity issue.

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Common issues and explanations:

* **No API Connectivity:** Target server can not reach to VirtualMetric API. Please check your firewall and proxy configuration.
* **Collector Failed:** An error occurred when VirtualMetric collects performance counters. Make sure that you have enough memory on target server. Please read **Message** column for more information.
* **Login Failed:** VirtualMetric can not login to remote server. Please read **Message** column for more information.
* **Unsupported Config:** A software requirement is missing. Please read **Message** column for more information.