Hi Anamika You don't say how you're sending and receiving commands to your product, but if it's IR, you may be experiencing problems with different uarts, this has been discussed here... http://groups.google.co.uk/groups?hl=en&lr=&safe=off&threadm=9sciak%24u1 a%241%40zappa.falch.net&rnum=1&prev=/groups%3Fq%3Draw%2Bir%2Bpalm%2Bsony %26hl%3Den%26lr%3D%26safe%3Doff%26selm%3D9sciak%2524u1a%25241%2540zappa. falch.net%26rnum%3D1 Regards John
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