# General ### Missing DLL Install [Microsoft Visual C++ Redistributable](https://aka.ms/vs/16/release/vc_redist.x64.exe) to resolve this. ### No message received from server There are a number of causes this could be related to. 1. Please ensure you have **allowed the program through your windows firewall and antivirus firewall**. 2. Some routers block incoming connections; if you know how to **configure your router**, try disabling the firewall or allowing incoming connections. 3. Otherwise, if you have a **mobile network you can switch to**, try that. 4. If you are **using a VPN**, disable it. Conversely, if you are not using a VPN, a VPN may help. ### My copilot's aircraft is below or above me or in the ground This is commonly due to mismatching sceneries. Please ensure you have the same add-on airports installed and that you're not at an airport that is handcrafted in one edition of the sim, but not in the other (Premium Deluxe vs Deluxe). ### My copilot's aircraft is in front or behind me Disable multiplayer and make sure you *are not* in the same group. If you're using an online network such as VATSIM or IVAO, check out [VATSIM/IVAO](/vatsim-ivao.md) for more information. ### Mismatching speeds/altitude Unfortunately, weather cannot currently be synced between flight simulators. If the sea pressure, ISA, temperature, and other weather-related aspects are different, you will experience desync. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.yourcontrols.org/troubleshooting/general.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.