Can't Install - I get a mysql error

Mysqli statement execute error : Lock wait timeout exceeded; try restarting transaction

1. Zend_Db_Statement_Mysqli->_execute() in Zend/Db/Statement.php at line 297
2. Zend_Db_Statement->execute() in Zend/Db/Adapter/Abstract.php at line 479
3. Zend_Db_Adapter_Abstract->query() in Zend/Db/Adapter/Abstract.php at line 661
4. Zend_Db_Adapter_Abstract->delete() in XenForo/Model/Phrase.php at line 1203
5. XenForo_Model_Phrase->deletePhrasesForAddOn() in XenForo/Model/Phrase.php at line 1226
6. XenForo_Model_Phrase->importPhrasesAddOnXml() in XenForo/Model/AddOn.php at line 328
7. XenForo_Model_AddOn->importAddOnExtraDataFromXml() in XenForo/Model/AddOn.php at line 226
8. XenForo_Model_AddOn->installAddOnXml() in ConvEss/Model/AddOn.php at line 24
9. ConvEss_Model_AddOn->installAddOnXml() in XenForo/Model/AddOn.php at line 169
10. XenForo_Model_AddOn->installAddOnXmlFromFile() in AddOnInstaller/XenForo/ControllerAdmin/AddOn.php at line 537
11. AddOnInstaller_XenForo_ControllerAdmin_AddOn->actionStepInstall() in XenForo/FrontController.php at line 351
12. XenForo_FrontController->dispatch() in XenForo/FrontController.php at line 134
13. XenForo_FrontController->run() in /home/hometheaterforum/public_html/community/admin.php at line 13