[TYPO3-dev] installation error

[Mohsen Pahlevanzadeh]

Dear all
I'm using testsite version.
I have created  a bank via  testsite.Now  when i  click  on  "import   
database" i recieve following erroro :
*Fatal error*: Allowed memory size of 8388608 bytes exhausted (tried to 
allocate 17895 bytes) in 
*/var/www/typo3/typo3_src-3.8.1/t3lib/class.t3lib_install.php* on line *596
What's my problem?
Please help me...
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