Could not load file or assembly

[gtaure]

Hi, I created a control and compile it. When I add it to an ASPX page it is displayed fairly good at design time. But when I am trying to run it an error has been raised.

Could not load file or assembly 'ServerTime' or one of its
dependencies. The located assembly's manifest definition does not match the
assembly reference. (Exception from HRESULT: 0x80131040)
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information
about the error and where it originated in the code.

Exception Details: System.IO.FileLoadException: Could not load file or
assembly 'ServerTime' or one of its dependencies. The located assembly's
manifest definition does not match the assembly reference. (Exception from
HRESULT: 0x80131040)

Source Error:

An unhandled exception was generated during the execution of the current
web request. Information regarding the origin and location of the exception
can be identified using the exception stack trace below.

Assembly Load Trace: The following information can be helpful to determine
why the assembly 'ServerTime' could not be loaded.

WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value
[HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.

Note: There is some performance penalty associated with assembly bind
failure logging.

To turn this feature off, remove the registry value
[HKLM\Software\Microsoft\Fusion!EnableLog].

Please help me with this.