Pyhton selenium drop down menu click : i want to select option from a drop down menu, for this i use that :

`br.find_element_by_xpath("//*[@id='adyen-encrypted-form']/fieldset/div[3]/div[2]/div/div/div/div/div[2]/div/ul/li[5]/span").click()`

To select option month 4 but when i do that pyhton return error message : 

`selenium.common.exceptions.ElementNotVisibleException: Message: element not visible
  (Session info: chrome=51.0.2704.103)
  (Driver info: chromedriver=2.22.397929 (fb72fb249a903a0b1041ea71eb4c8b3fa0d9be5a),platform=Mac OS X 10.11.5 x86_64)
`

That is the HTML code:

    </div>
		<div class="form-row exp-date clearfix fancyform">
			<div class="formfield expired-label monthcaption">
				<label>Date d'expiration <span>*</span></label>
			</div>
			<div class="formfield month">
				

 	
 	
	
	

		
		
		
			
			<div class="value value-select">
				
				
				
					

					<select class="selectbox required" id="dwfrm_adyenencrypted_expiryMonth"   data-missing-error="Veuillez sélectionner le mois d'expiration"  data-parse-error="Ce contenu est invalide"  data-range-error="Ce contenu est trop long ou trop court"  data-value-error="Cette date d'expiration est invalide"  pattern="^(:?0[1-9]|1[0-2])$"  required="required" >
 
					
						
						
							<option class="selectoption" label="Mois" value="">Mois</option>
						
					
						
						
							<option class="selectoption" label="01" value="01">01</option>
						
					
						
						
							<option class="selectoption" label="02" value="02">02</option>
						
					
						
						
							<option class="selectoption" label="03" value="03">03</option>
						
					
						
						
							<option class="selectoption" label="04" value="04">04</option>
						
					
						
						
							<option class="selectoption" label="05" value="05">05</option>
						
					
						
						
							<option class="selectoption" label="06" value="06">06</option>
						
					
						
						
							<option class="selectoption" label="07" value="07">07</option>
						
					
						
						
							<option class="selectoption" label="08" value="08">08</option>
						
					
						
						
							<option class="selectoption" label="09" value="09">09</option>
						
					
						
						
							<option class="selectoption" label="10" value="10">10</option>
						
					
						
						
							<option class="selectoption" label="11" value="11">11</option>
						
					
						
						
							<option class="selectoption" label="12" value="12">12</option>
						</select>

What is wrong ? I know selenium cant find the element but i dont know why , xpath wrong ? i need to use other method to find element ? thanks for anwsers 
					
					

