DSP Builder doesn't compile the Simulink files

[Altera_Forum]

Hello, thank you for see this post. 

DSP Builder doesn't compile the Simulink files.  I'm using MATLAB R2013 Student Version. I want to transform my original Simulink file  into VHDL file by SignalCompiler(DSP Builder)  in order to implement to Cyclone&#8546; EP3C 120 FPGA Development Board  by Quartus &#8545; 12.1sp1 Web Edition(32bit). But when I open the window of Signal Compiler  and push the button to compile the file, this message appears&#8595;   Info: Generating HDL Info: Analyzing Simulink model Matlab Error &#65411;G&#65411;&#65417;&#65409;[ alt_dspbuilder_mdl2xml (line 36) Java exception occurred:  com.altera.dspbuilder.common.DSPBuilderException: Unable to obtain a DSP Builder license. Please check that your LM_LICENSE_FILE environment variable is set to a valid license file or license server. LM_LICENSE_FILE is currently "1800@192.168.101.6".  at com.altera.dspbuilder.serialisation.ModelSerialiser.<init>(Unknown Source)  at com.altera.dspbuilder.serialisation.ModelSerialiser.<init>(Unknown Source)  at com.altera.dspbuilder.serialisation.ModelSerialiser.<init>(Unknown Source) Error: Error during compilation: Error: Error analyzing model see log for details.  This message also appears when I compile the existing test program.  For example,"in_out.mdl".   What is wrong???