If you have any problems with ACS2012 Webpage, the technical problem you have seems to be caused by, perhaps, the web browser installed in your computer. The ACS website is best compatible with Internet Explore 7 (http://www.microsoft.com/en-us/download/details.aspx?id=2) and Google Chrome (http://www.google.com/chrome?hl=en) Please try again with either of these web browsers. 2. If on-line registration is unavailable, you can use the attached forms for registration. please fill out these forms and return it to the ACS2012 Secretariat via e-mail (reg@acs2012.kr) 3. If you have signed up and/or submitted your abstract successfully, but you have difficulty with on-line credit card payment, you can choose other payment methods: Credit Card Authorization or Wire Transfer If you would like to use Credit Card Authorization, please fill out the attached form and return it to ACS 2012 Secretariat via email(reg@acs2012.kr). ※ On-line Credit card payment must be authorized for security concerns particularly for oversea's users. This [Overseas Card 3D Secure Procedure] is a payment system verifying credit card (by VISA), has been in use internationally. If an Error message shows up during payment procedure, Please refer to the attached file.