All the Symbolic Toolbox functions call the Maple kernel, which is supported by Maplesoft, Inc.The solution for this issue, as mentioned on Maplesoft's web site, is to configure any firewalls on your personal computer to allow internet access for the Maple executable. In the case of the Symbolic Toolbox, the Maple kernel runs underneath of MATLAB, so the executable that needs to be allowed through the firewall is matlab.exe, located in $MATLABROOT\bin\win32. Here, $MATLABROOT refers to the directory on your hard drive where you have installed MATLAB.
Note that Windows XP and XP SP2 contain a built-in firewall, which also may need to be configured to allow the Maple kernel to function correctly. Contact Microsoft Technical Support for instructions on how to allow matlab.exe access through the built-in firewall.
Note that the Maple kernel does not actually access the Internet; it simply uses a protocol (TCP/IP) to communicate on your local computer that many firewalls block.
