install problem ZH googlemap component

Hi,
I tried to install the Zh GoogleMap extension, component version 5.5.2.0 (updated on mar 12,2014) for joomla 2.5, but got the following installation error .
“There was an error uploading this file to the server. Unable to find install package”
Transferring the files manually and using joomla/extension/discover gave the error: “JMinstaller: Install SQL File not found”
Could it be there’s a file missing in the zip-package?
(the module installed without problems)

Check your PHP settings. The archive is over 2M. PHP by default receive 2M. You have to set in this case enable upload file size 4M or more. I wtote it in JED too

You should keep in mind - the extension archive is more than 2M: The File Size Upload Limit (upload_max_filesize) on your Web Server might be set to low to allow larger files to be uploaded. By default PHP allows files up to 2 MB.